Screen sizing and separating machinery.



No.. 864,827. i Jl M. CALI-'Owl PATBNTED vSEPT. 3, 1907'. SCREEN SIZINGAND SEPARATING MACHINERY.

APPLICATION IILBD APB.. Z4. 1905. BBNEWED JUNE l. 1908.

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Inventor M CA n.0 w

PATENTED SEPT. 3, 1907.

J. M. cALLow. scREBN sIzING AND SBPARATING MACHINERY.

APPLIOATIUN FILED APILM. 1905. BENEWIID JUNE 1, 1906.

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Inwrrtor A LAO W Je H N. M

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No. 864,827. PATENTED SEPT. 3. 1907. J. M. GALLOW. SCREEN SIZINGANDSEPARATING'MAGHINERY.

APYLIULTION TILBD APR. 24. 1905. BENEWED .TUNE l, 1908.

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A ttest J [IM/egim Y' OHN I Awww by @urna No. 864,827. PATENTED SEPT. 3,190'?.V

J.- M. CALLOW.

SCREEN SIZING AND SEPARATING MACHINERY. rPLIuAToN FILED n.u; 1905.BENBWED JUNE 1, 190s.

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li and C, and the sides are connected to the sides of the machine l",the whole being suitably held together by the bolts at' at.

G G are bearings for the shafts of the rollers B and C, and H H arestruts which support the screen and its framework at all four corners.rl`he deflecting roller D is held in position by links J, and serves todefiect and tighten the screen belt by its own weight. The whole machineis preferably set at an inclination with the horizontal so that thedelivery roller shall be somewhat higher than the tail roller.

The screen belt is shown in enlarged section in Fig. 5; A is the screencloth, K K are endless bands of rubber or other flexible material, withvertical side flanges, the horizontal leg of each being split along itswhole length and receives the edges of the screen cloth, which arefastened by the staples L L or other suitable means. These flanged edgesK K serve the purpose of carrying the screen cloth in its travel aroundthe rollers, taking the strain and pull due to the revolution of thedriving roller and preventing this strain or pull from coming upon thedelicate screen cloth. The flanges serve also to confine the oversizeand ore on the screen and prevent its overflowing the edges of thecloth.

Suitable driving means, as a worm and wheel M, are attached to the shaftof the head roller and connected with the driving shaft N by suitablemeans, as the worm shaft O, the friction pinion P and the friction diskQ. The friction pinion P is movable along the shaft O for varying thespeed of the shaft, and is held in contact with the friction disk Q bythe adjusting boxes R R. The shaft N is also provided with cranks S towhich are fitted connecting rods T, connected to the frame of themachine by the cross bar U. Power is applied to the shaft N by suitablemeans as the driving belt V and the pulleys W, and the machine is givena horizontal end shake, while at the same time the head roller B isdriven by means of the worm and wheel M through the connecting shaft Oand the friction disk and pinion P and Q. 'lhe worm shaft O ispreferably broken at Y and is provided at this point with a sleeve Zkeyed to one section and working loosely on a feather key oil the other,to allow of the movement of the worm shaft caused by the reciprocationof the machine.

a4 is a feed box and apron provided with distributing buttons b and aflexible apron c for protecting the deflecting roller D.

d d are orifices in the sides of the machine covered with revolvingdisks e, in which are a series of different sized holes for varying thesize of orifice as maybe necessary for the proper' operation of themachine. suitable means may be provided for this purpose.

f and g are discharge holes in the bottom of the machine for thedischarge of the products from their respective ends. v

The operation of the machine is as follows: The machine is set in motionby the driving belt V and reciprocated endwise, the screen being causedto travel forward by the mechanism already described; the material to betreated, together with its accompanying water, is fed into the feed boxa and distributed over the roller D and falls on the moving screen beltA. The oversize portions are at once carried forward by the screen beltand discharged over the head pulleyB and dropped into the hopper f. Toassist in the complete cleansing of the belt of any adhering particles,the spray pipes h are preferably provided. The undersize portions of thefeed, together with the water, fall through the screen cloth into thepan E and pass out through the orifices d into'the catch bottom, andthence to the hopper g. The perforated disks e in front of the orificesd are now revolved until the right sized hole covers the orifice, andthereby the water is raised in the pan E high enough to wash or irrigatethe screen cloth by the end shake of the machine, any amount of watergreater than can pass the orifices being splashed over the tail roller Cand thence into the hopper y. r1`he front end of the machine beinghigher than the back, no water or undersize can pass over it, and thisis furthermore prevented by the defiector j which, on the backwardstroke of the machine,throws the water back toward the tail end. ln thisway the ore on the screen is subjected to a very perfect process ofwashing, cleansing it of slimy particles and making a perfectly clean,sized product. Since the wave action is in the opposite direction to thedischarge of the oversize, the particles retained onthe screen are metand washed many times by the opposing waves. The discharge of some ofthe water over the tail roller also serves a most important purpose,cleansing and washing the oncoming screen cloth of any slimes andparticles entrapped in its meshes, and thus enabling a perfectly cleanand unblinded surface to be continuously presented for the reception ofthe materials to be screened.

By means of the movable friction pinion P, a variable rate of speed canbe given to the screen belt, and the rate of progression of the oversizevaried at will, according to the requirements of the materials to beseparated. The discharge of the oversize is also independent ofthegravity of the material, and is unaffected within wide limits of theangle at which -the screen cloth lies; it can thus be renderedindependent of the speed of the reciprocating motion, and its consequentdestructive effects, the reciprocation being only frequent enough to dothe necessary washing; the wear on the screen cloth is also distributedover the entire surface of the screen belt,-a unique and importantnovelty not possessed by any existing machine designed for this purpose.

I claim and desire to secure, by Letters Patent, the following.

l. In screen sizing apparatus, the combination of a frame, a water tankthereon, an endless traveling band of' screen cloth, means for suportingit at its ends above such tank, intermediate means for deflecting theworking portion of the band below tbe level of the supporting means andinto the water, and means for imparting a reciprocating motion to theframe.

2. In screen sizing apparatus, the combination of a frame, means forimparting reciprocatingmotion thereto, a water tank on the frame, anendless traveling band of screen cloth, means for supporting it at itsends above such tank, intermediate means for deflecting the werkingportion of the band below the level of the supports-and into the water,and means for maintaining a substantially constant amount of water inthe tank.

3. ln screen sizing apparatus, the combination of a frame, means forimparting a reciprocating motion thereto, a water tank on the frame, anendless traveling band of screen cloth, means for driving said band,means for varying the speed of travel of the same, and means forthrowing back 'the water in the tank at each forward stroke of themachine.

el. In screenA sizing apparatus, the combination of a frame, means forimpartinga reciprocating` vmotion thereY to, a water tank on the trame,an endless traveling,I band of screen cloth, means for dellccting; theworking portion ot the band into the water, means for maintaining,l asubstantially constant amount of water in the tank, and means forthrowingback the water in the tank at each forward stroke of themachine.

5. In screen sizing; apparatus7 the combination of a frame, Ine-ans forimparting a reciprocatingr motion thereto, a water tank on the frame,head and tail rollers, an endless band of screen cloth traveling oversaid rollers, means for detlecting the working portion of the band intothe water, and means for throwing back the water in the tank at eachforward stroke of the machine.

G. In screen sizing apparatus, the combination with a frame, means forimparting reciprocating motion thereto, a Water tank on the frame, anendless traveling band of screen cloth, a roller arranged to deect theworking portion of the band into the water, and a detlector in the tankadapted to throw back the water at each forward stroke of the machine. l

7. In screen sizing apparatus, the combination of a water tank head andtail rollers, an endless traveling,` band of screen cloth, means fordriving said band of screen cloth, means'for varying; the speed oftravel of the same, and means for throwing back the water in the tankover the tail roller.

8. In screen sizing apparatus, the combination of a Water tank, head andtail rollers an endless traveling band of screen cloth, means fordeflecting said band into the Water, means for maintaining` asubstantially constant amount of Water in the tank, and means forthrowing back the water in the tank ever the tail roller.

9. In a screen sizing apparatus, the combination ot' a water tank, headand tail rollers, an endless band of screen cloth traveling over saidrollers, lneans for deiiecting the band into the wa ter, and means forthrowing back JOHN M. CALLOW.

Witnesses T. 1G. CoNnAD, MAE THonNn.

